On a normal day, Majken Friss Jorgensen, managing director of Copenhagen’s biggest limousine company, says her firm has twelve vehicles on the road. During the “summit to save the world”, which opens here tomorrow, she will have 200.

“We thought they were not going to have many cars, due to it being a climate convention,” she says. “But it seems that somebody last week looked at the weather report.”

Ms Jorgensen reckons that between her and her rivals the total number of limos in Copenhagen next week has already broken the 1,200 barrier. The French alone rang up on Thursday and ordered another 42. “We haven’t got enough limos in the country to fulfil the demand,” she says. “We’re having to drive them in hundreds of miles from Germany and Sweden.”

And the total number of electric cars or hybrids among that number? “Five,” says Ms Jorgensen. “The government has some alternative fuel cars but the rest will be petrol or diesel. We don’t have any hybrids in Denmark, unfortunately, due to the extreme taxes on those cars. It makes no sense at all, but it’s very Danish.”…

The temptation, then, is to dismiss the whole thing as a ridiculous circus. Many of the participants do not really need to be here. And far from “saving the world,” the world’s leaders have already agreed that this conference will not produce any kind of binding deal, merely an interim statement of intent.